Noel wilke



,N. WILDE.

PERPETUAL CALENDAR,

APPLICATION mar MAY 29, 1920.

IIIIII IIIIIlIlIllll-l II Funk? NOZY W/Z DE.

entree stares nonL WILDE, on ronoirro, onranro, CANADA.

PERPETUAL CALENDAR.

releases;

Specification of Letters Patent.

Patented Mar. 1, 1921.

Application filed May 29, 1920. Serial No. 385,10

T 0 aZZ whom it mfaflg/ Be it known that I, NoiiL WILDE, a sub ",ect ofthe King of Great Britain, residing at Toronto, in the county of York,Province of Ontario, Canada, have invented certain new and usefulImprovements in Perpetual Calendars, of which the following is thespecification.

liiiy invention relates to improvements in perpetual calendars. and theobject'of the invention is to devise a calendar of this class whichwould have the days of each month arranged to correspond to thearrangement of an ordinarycalendar and yetmay be adjusted by a singlemovement so that the days of each month may be made readable for anyyear of any century within the limits of 4000 years and it consistsessentially of the arraiwement and construction of parts as hereinaftermore particularly explained.

Figure 1 is a face view of my calendar showing the arrangement of themonths and the numerals indicating the days of *the month.

Fig. 2 is a face view showing the rear side of my calendar, on whichside appears the century and year scales which coact with the ordinarycalendar appearing on the opposite or front face.

Fig. 3 is a sectional view through my calendar on line 3-3.

In the drawings like characters of reference indicate correspondingparts in each figure. r

1 indicates an outer casing provided with a front plate 2 and a rearplate 3 separated apart by end spacingstrips 4: and 5, and top andbottom spacing strips 6 and '7, thereby forming a hollow casing. 10 is aslide plate which fits within the hollow casing and tits between thefront plate 2 and the back plate 8 and extends'between the top andbottom strips 6 and 7 The front plate 2 is provided with 12 exhibitingorifices 9, the months of the year being indicated above each orifice,that is to say, March, April, May, June, July. August. September,October, November. December, January, and February. It will be notedthat according to my arrangement the year starts with the month of Marchand ends with the month'of February, thereby eliminating the necessityof making adjustment in the calendar durinn the year to compensate forleap years. Below the indication of the month over each orifice 9,appear the indications of the days of the week, that is to say Sunday,Monday, Tuesday, l/Vednesday, Thursday, Friday, Saturday, to correspondwith the arrangement of the ordinary calendar. 1.0 is the slidahle plateupon which are arranged the numerals indicating the days of the week. Itwill benoted that these numerals are so arranged that no matter to whatposition the plate 10 is slid laterally the proper numerals forindicating the days will always appear through the exhibiting orifices9,

let ussay, for instance as shown in the draw. ing themonth of March 'isprovided with the numerals 1 to 8.1. If the plate 10 is slid to the leftone'spa'ce numerals 1 to'3l will still appear, If tl1eplate-10 is slidin the opposite direction any desired number of spaces the numerals 1 to31 will always appear. In other words the vertical setof numerals onone'side of an. exhibiting orifice and which are covered by sliding theslide plate 2 in one, direction are provided with a complementary set ofnumerals on the oppositeside of the exhibiting orifice which areuncovered by the same movement. 'On the opposite side of the calendar,that is to say in the plate 3 is formed an exhibiting orifice 11.Beneath thls exhibiting orifice 18 arranged year scale '12 upon theslidable plate 10 and upon the opposite face of such plate to the dayscales hereinbefore de-v scribed. It will be noted that theyears arearranged in groups of four with a blank space intervening between eachgroup to indicate the leap year. Above the exhibiting orifice 11 isarranged a century scalefthe numerals of the century scale being soarransredthat all the years appearing under each number will correspondone to the other as to the days on which any given date will fall, thatis to say, as shown in the calendar the numeral 20 indicating the yearappears in vertical alinement with the numeral 19 indicating thecentury. All the other years arranged in the same" vertical column. willhave their arrangement of days corresponding to that of the year 1920and similarly thesame arrangement of days will occur in all thecenturies indicated in the same vertical column. 13 is a slot formed inthe front plate 2 and 1 is a projection extending from the movable plate10 through the slot 13 so that the movable plate-may be manipulated bythe hand of the operator' In adjusting the calendar for any given yearthe number of the year is first found on the year scale and the numberof the year moved by the sliding of the plate 10 beneath. the verticalcolumn of the century scale to contain the number of the century. As theday scales appear on the opposite face of the plate 10 the correspondingadjustment is made. It Will be understood that there are only sevendifferent arrangements oi days and that therefore each arrangement ofdays corresponds to each column of the year and century scales so thatif the year scale is moved over a certain number of columns, the dayscale is moved the corresponding number, and therefore exhibits thearrangement of days corresponding to the year to which the calendar is.adjusted.

What I claim as my invention is:

1. In a perpetual calendar, the combination With a stationary memberhaving the months and days of the week indicated thereon and astationary century scale also inscribed on the stationary member andarranged in columns of centuries of the same calendar, of a movablemember having day date numerals arranged in columns under the Week dayindications of the stationary member, and a year scale the years ofwhich are arranged in columns of the same calendar and located beneaththe century scale, the columns of week day numerals and the columns ofthe year scale being so arranged that columns of Week day numerals andyear scale are moved in unison beneath the corresponding Week dayindications and columns of the century scale,

2. A perpetual calendar comprising a casing having day and year scaleexhibiting orifices, a plate slidable Within the casing having a monthday scale extended With complementary columns of figures at each side,adapted to be simultaneously covered on one side of the orifice anduncovered on the opposite side by the movement of the slide platebeneath the orifice and a year scale having the years arranged in aseries of columns each column containing a series of years having thesame calendar, one column corresponding to one or the columns of the dayscale, and having the number of columns exposed by the exhibitingorifice of the casing corresponding to the number of exposed columns ofthe day scale, and a century scale located over the year scale andarranged in columns of centuries having the same calendar, the century,year, and day scales cooperating when moved to indicate the day, monthand year of any given century,

NOEL "WILDE.

